2131323407365 has 8 divisors (see below), whose sum is σ = 2570570770680. Its totient is φ = 1696403604672.

The previous prime is 2131323407351. The next prime is 2131323407377. The reversal of 2131323407365 is 5637043231312.

It can be written as a sum of positive squares in 4 ways, for example, as 1320253854529 + 811069552836 = 1149023^2 + 900594^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131323407365 - 2¹¹ = 2131323405317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081889070 + ... + 1081891039.

It is an arithmetic number, because the mean of its divisors is an integer number (321321346335).

Almost surely, 2^{2131323407365} is an apocalyptic number.

It is an amenable number.

2131323407365 is a deficient number, since it is larger than the sum of its proper divisors (439247363315).

2131323407365 is a wasteful number, since it uses less digits than its factorization.

2131323407365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163780311.

The product of its (nonzero) digits is 272160, while the sum is 40.

Adding to 2131323407365 its reverse (5637043231312), we get a palindrome (7768366638677).

The spelling of 2131323407365 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-three million, four hundred seven thousand, three hundred sixty-five".